WHY IS EARTH CALLED A MAGNET ?

Asked by ADev Barman | 22nd May, 2013, 10:52: AM

Expert Answer:

The magnetic field of the Earth is a result of a huge electric current that flows in the molten portion of the Earth's outer core, which is composed of highly conductive molten iron and nickel. A magnetic field is generated by a feedback loop: current loops generate magnetic fields (Ampère's circuital law); a changing magnetic field generates an electric field (Faraday's law); and the electric and magnetic fields exert a force on the charges that are flowing in currents (the Lorentz force).
 
No, the geographical northpole is not same as that the magnetic north pole. Infact it is the reverse. So, magnetic north pole is at an angle of 11degree with respect to the geographical rotational axis and points in the direction of geographical south pole. 

Answered by  | 23rd May, 2013, 02:31: AM

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